Steam hydraulic press.



L. IVERSEN.

STEAM HYDRAULIC PRESS. APPLICATION FILED JUNE 21', 1911.

1,028,356. 7 Patented June 4, 1912. I 3 SHEETSSHEBT 1.

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Patented June 4, 1912.

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Patented June 4, 1912.

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INVENTOR UNITED STATES PATENT OFFICE.

LORENZ IVERSEN, OF WEST HOMESTEAD, PENNSYLVANIA, ASSIGNOR TO MESTA MACHINE COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENN- SYLVANIA.

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Specification of Letters Patent.

Patented June 4., 1912.

To all whom it may concern:

Be it known that I, LORENZ IVERSEN, resident of West Homestead, Allegheny county, Pennsylvania, have invented a new and useful- Improvement in Steam Hydraulic Presses, of which the followingis a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a vertical section of the press embodying my invention, one of the pullback or liftingcylinders and part of one balancing cylinder being broken away; Fig. 2 is an enlarged vertical sectional view of the valve portion of the press; Fig. 3 is an end view of the valve mechanism; and Figs. 1, 5, 6 and 7 are views partly in section and partly diagrammatic showing the different positions of the control valve.

My invention has relation to hydraulic presses, hammers, shears, and the like, which employ steam hydraulic intensifier apparatus; and relates more particularly to the valve mechanism employed for controlling the operation of the press.

An object of my invention'is to provide valve apparatus of this character which can be operated by a movement of a single lever, which will be simple in its construction and mode of operation and inthe use of which .the movements of the press head or 'ram will always follow and be in the di-' rection of the movements of' the singlecontrol lever.

The nature of my invention will 'be best understood by reference to the accompanying drawings, in which Ihave shown the preferred embodiment thereof, and which will now be described, it being premised, however, that various changes can be made in the details of construction and arrangement of the several parts by those skilled in the art without departing from the spirit and scope of my invention as defined in the appended claims.

In these drawings, thenumeral 2 designates the bed-of the press, 3 the vertically movable press head which is arranged to work within the cylinder 4.

5 designates one of the pull-back or lifting cylinders.

6 designates the intensifier cylinder, 7 the steam piston of the intensifier having a rod 8.

9 is the plunger of the press head 3'.

10 designates hydraulic balancing cylinat opposite sides 0 ders for the pull-back or lifting cylinders 5, these cylinders having liquid supply connections 11 with the accumulator 12.

13 designates the supply connection for the hydraulic cylinder 4:, and 1 1 is thecheck valve which normally prevents back flow of liquid out of the said cylinder.

15 designates the steam supply connection for the cylinder 6, which is controlled by a vertically movable valve 16; and 17 is the exhaust for the cylinder 6 controlled by the vertically movable valve 18.

The parts thus far referred to are well known in the art, and form no part of the present invention. They 'need not, therefore, be described in detail.

19 designates the casing for the control valve, this casing being in the form of a cylinder provided with the inlet ports 20 and 21 at different vertical heights and opening into a chamber 22 which communicates with the steam inlet passage 22. The casing 19 also has the exhaust port 23 opening into the exhaust chamber 24: which communicates with or forms a part of the exhaust passage 17 and also has a port 23 which registers with the steam passage 23 leading to a cylinder 23 whose piston is arranged to control the check valve 14 before described. Seated within the valve cage .end of the bushing and through the bottom of the valve cage, and is formed with a slotted head 31 at its lower end, which engages a crank pin 32 on a crank arm 33 of a rock shaft 34. This shaft is connected by a link 35' with a crank arm 36 on a shaft 37. Mounted on the shaft 37 is a peripherally grooved wheel or sheave 38, over which passes a cord, belt, or other flexible connection 39. This flexible connectlon 39 extends downwardly to the controlling lever' 40, its two ends bein connected to said lever the lever fulcrum 41.

The shaft 37 also carries a cam arm 42, which is arranged to act upon alever 43 having a lifting engagement with the depending stem 18 the exhaust'valve 18.

The shaft 37 also has a crank arm 44 which is connected by alink with a crank arm' 46 on a shaft 47 having an arm or cam 48 adapted to act on the lever '49, which has a lifting engagement at with the upwardly extending stem 16 of the intensifier cylinder inlet valve 16.

' The actuating lever 40 is designed to have the different positions indicated in Fig. 1, as raising, return stop, lowering, stop and forging. In Figs. 1 and 2 the parts are shown in the posltion' which they occupy when the lever is in the stop position after having been moved up-, wardly from the forging position; In this position both the arms or cams 42 and 48 are out of operative contact withthe respective levers 43 and 49, and the valves 16 and 18 are both closed. The revolution of the grooved, wheel or sheave 38, through the 1 now flows from the inlet 15 through the open operation of the flexible connection 39 has moved the control valve into the position shown in these Figs. 1' and 2, in which the inlet ports 20 and 26 of the valve cage and bushing are in register, and the exhaust ports Y23 and 28 are also in register. The valve covers the bushing port 28, which is now in line with the casing port 23". Steam upper end of the bushing, and through the ports 20 and 26 into the chamber 22, which is connected by a pipe 22 with the pullback cylinders to admit steamunder the pistons thereof.

Fig. 4 shows the position of the valve parts when the actuating lever has been moved to its extreme upper or raising position. In moving to this position the valve 29 has moved downwardly to its lowered position; and in so moving has engaged an interior flange 25 at the lower end of the bushing 25 and has moved said bushing downwardly within the cage to its lowered position. The ports 20 and 26 are now out of register, but the ports 27 and 21 are in registering positions, so that steam will still beadmitted through the bushing to the pullback cylinders. In this position, the port 28 has been moved down into line with the port 23, thereby admitting steam to the pipe 23 This actuates the cylinder 23 to openthe check valve 14 and permit some of. the water to flow out of the hydraulic cylinder 4 so that the ram or press head can be permitted to rise.

The valve spool 29 has been moved down sufliciently so that its upper flange partially uncovers the port 28 in this position to admit steam therethrou h.

' The exhaust ports 23 and 28 are in line with each other, so that steam can exhaust from the intensifier cylinder, the exhaust valve 18 having been opened by the action of the cam or crank 42. Y

In the position of the arts shown in Fi 5, the lever is on the stop-return position. simply moved upwardly to the extent shown by comparison of Figs. 4 and 5, and the only port change which has occurred is the parbelow the top flange ofthe valvespool. This permits the check valve operating cylinder 23 to exhaust through the spool valve and through the exhaust ports 23 and 28.. Steam is still being admitted to the pull-back cylinders.

In the position of the parts shown in Fig. '6, the lever is on the lowering position. In this position it is desired to lower the This can only be effected by exhausting steam from the pull-back cylinders; and this which the supplyis cut oflt' to such cylinders and then opened to the exhaust. In this position, ,the valve spool has moved upwardly so as to partially uncover the alined ports 21 and 27 below the top flange of the pull-back cylinders can enter through said ports and exhaust through the ports 23 and 28. The exhaust port 28 for the cylinder 23 still remains open.

ing' position. In moving to this position, the spool has engaged the bushing to move it upwardly into the position shown and bringing the ports 20 and 26 into alin'ement and moving the ports 21 and 27 out of alinement. In coming to these positions, the Wheel or sheave 38 has moved to actuate the crank arm 44, the link 45, rock shaft 47 and crank arm or cam 48 into position to open the intensifier cylinder inlet valve 16. This completes the cycle of operations.

. 'It will be seen that the press head or ram t-rol lever. That is to say, the control lever is moved upwardly to raise the press head or ram, and is moved downwardly to lower the same. This makesasimple and-natural movement of the lever in'accordance with the operations desired.

The control valve described is simple in its construction, and operation, since the only movable parts are a cylindrical sleeve or bushing and a plain spool valve; and the same actuating movements which control these valve parts also control, at the proper, times, the intensifier cylinder inlet and exhaust valves.

It will be understood that the valvemechanism herein described, which forms the subject of my invention, is not limited in its application to the particular press-which is illustrated and described; but that, on the In this position, the valve spool is' tial uncovering of the port 28 which is now press head or ram with respect to the work.

is the only position of the valve parts in -valve, so that the exhaust steam from the.

Fig. 7 shows the valve partsin the f org- I exactly follows the movements of the con- 'obvious that various changes can be made in the details of construction and arrangement of the parts without departing from the spirit and scope of my invention. Thus, the

actuating connections between the lever and.

the valve stem may be changed, the form of the valve and of the bushing, together with the ports thereof may also be varied; and the actuating connections for the intensifier inlet and exhaust valves can also be changed.

What I claim is 1. In a steam-hydraulic press or the like having a press-head and pull-back or left cylinder, a control valve comprising a valve cage having ports therein, a ported member movable within the cage, .a valve member movable relatively to the ported member,

and also arranged to actuate the said member at the limits of its movement, and a single actuating device connected to the valve member, said valve member, ported member and cage being constructed and arranged in different positions of the parts .to control the raising and lowering of the press-head; substantially as described. 7

2. In a steam-hydraulic press or the like, having an intensifier cylinder, a hydraulic cylinder, a relief device for said cylinder and pull-back or lift cylinders, of a controlling valve device for the pull-back cylinders and the relief device for hydraulic cylinder, said device comprising a valve cage or casing having ports in communication with the ports leading to said cylinders, a member movable within the cage or casing and having cooperating ports, a movable valve movable relatively to said member and also adapted to actuate the same, and means for actuating the valve; substantially as described.

3. In a'steam-hydraulic press or the like, the combination with an intensifier, a hydraulic cylinder, a relief device for said cylinder and pull-back or lift cylinders, 'of a compound valve device for controlling the pull-back cylinders and the relief device for hydraulic cylinders, said device comprising a cage member having ports therein, a ported member movable within the cage, and a valve member movable relatively'to the ported member and also arranged to actuate the said member at the limits of its movement and a single control lever connected to said device to actuate the same,-

said lever having .a direction of movement corresponding to the direction of movement of the press-head; substantially as described."

4. In a steam-hydraulic press or the like, the combination with an intensifier, a hydraulic cylinder, having a relief device and pull-back or lift cylinders, of a controlling valve device for the pull-back cylinders and the relief device of the hydraulic cylinder, said device comprising a valve cage having ports communicating with the supply and exhaust connections of the said cylinders, a sleeve movable longitudinally within the cage and having ports which cooperate with the ports of the cage, said sleeve havingan open end communicating with a steam supply connection, a valve member movable within the sleeve and also adapted to move the sleeve, and actuating connections for the valve member; substantially as described.

5. In apparatus of the character described, the combination with a ported valve cage, of a sleeve or bushing member arranged to move longitudinally within the cage and having cooperating ports, a valve member movable longitudinally within the sleeve or bushing member, andalso arranged to move said member, the movement of the valve and the sleeve controlling said ports, a rotatable member, actuating connections between the rotatable member and the stem of the valve memben, and a lever having an actuating connection with the rotatable member; substantially as described.

6. In apparatus of the character described, having an intensifier cylinder, and pullback or lift cylinders, the combination with a control device for said cylinders compris-' ing a ported valve cage, a ported sleeve or bushing movable longitudinally within the cage, and a valve member movable within the sleeve or bushing and also arranged to effect the movement thereof, a rotary actuator for the valve member, separate inlet and exhaust valves for the intensifier cylinder, and means operated by the actuator for opening and closing said valves at the proper times in the movements of the actuator; substantially as described.

7. In apparatus of the characterdescribed,

having an intensifier cylinder, and pullback or lift cylinders, the combination with a control device for said cylinders comprising a ported valve cage, a ported sleeve or bushing movable longitudinally within the cage, and a valve member movable within the sleeve or bushing vand also arranged to effect the movement thereof, a rotary shaft, means for rotating said shaft, connections between said shaft and the stem of the valve member, separate inlet and exhaust valves for the intensifier cylinders, and means carried by said shaft for actuating said valves; substantially as described.

In testimony whereof, I have hereunto set 

